Crank-case cooler for motor vehicles



June 1 1926.

J. R. MILLER CRANK cm: COOLER FOR amen van ICLES Filed Sept. 1, i922 Jaw 124?? 291m 22 m far Pa e-nice. June 1 1 923.

QBANK-CAEE @QQLEB 1 0E WLEIZF Application flied Scptembe" 31, 15922. Seial i585 This invention relates to internal combusticn engines and more particuiarly to means for cooling the crank case of internal combustion engines.

it is an object of the present invention to provide means for defining a circulation oi air through the crank case of en internal combustion engine, and a further object is to provide means for admitting eiren for preventing its return and to provide other meens for permitting the escape of the scisinittecl air from the ceenk'case.

It is'en object to provide air circulating means whereby cool air is constantly drawn to and discharged from the crank case of en internel com ustion engine for cooling the crank case and 1 operating parts and, therefore, for reiiucin the consumption of lubricating .oil and a so for reducing carbonaceous deposits resulting from the herd.-

fening of the ,oil substances in the hot pcre tions of the motor.

Other objects will be made manifest in the following specification of an embodimerit of the invention illustrated in the accompisnying-drawings, in which:

Figure -1 is a vertical transverse section through c crank case and cylinder of en internel combustion engine encl showing the invention applieii,

Figure 2 is a perspective of e conventional "form cf engine to which the inventicn is epplied.

ihe invention is shown as incorpcmteoi with an internal combustion engine having; e crank case 2 above which is arranged the usual combustion cylinder 3 in which opei'eies a piston 5., The piston is connectcil by a link 6 to acrenk shaft 7.

The invention involves a suitable upwziecl 1y extendi pipe or tube 10, the head of which may e supported as by :1 suitable brsclret clamp; the upper end of the pipe being open and covered by a suitable guer or esp 12. in the lower end of the intake pipe 1011s an inwardly openingcheci: valve 13. I Preferelol on the opposite side of the creek case em the inlet pipe 1.0, is an outlet pipe 14, the inner end 15 of which is arranged at the upper portion of the crank case. The upper end of the outlet pipe is supported by a clamp bracket lfiemi its upper end may be covered by a pivoting elbow cep 1"3'. i

The pivoting elbow cep 1'4" is clearly shown es incluriing en elhowerl cc with 22 screen 21.

when. there is as natural flow air the air current wiil i ewey from the direction :Eroin T n current is moving, and this 0 dues a suction in the outlet let valve '13 under piston will he anti-eel veiocity the inlet clue to e in the accretion cf the i. tions of the air in o I to the reciprccetions or? to @rcw sir thro gh if which seats to prc'vlo nuiseting sir in crank J: let} in temperature by the air with the t the eperet" ere c-ccler "w h c con e pie-n5; in the emoiint of info e '1 i e reciuction cit cm from of? lecting the hot s The pulsetions of the mizu'ug of the ccei in in coin'iaineticn case the critical i pipe is i engine,

The or c2: below pe. section 26* of he i preferably jcineo to l crank case by screw threeue that the wire gauze may he removal of the section 29. I V

The iniet check valve i3 is ccnstructecl r." a spider f liafi eving r. ti ht through which operates the L the valve head. 25 thereon enc iensioeeri between the ans. i the head of stern. eihew or c is prefersloiy concerted on ing reel 2'! Wi 'ch is i 28. The slim i .U ei mecca-ii resorted to within the spirit of the invention -air outlet.

separated from the top of the outlet pipe 1-1 so as to leave an annular space 30 through which a certain amount of air w ill be drawn. A gauze '31 is also inserted in the outlet pipe. t will be noted that the an outlet in drawn in thron -h the outlet.

Various modifications and changes may be as claimed.

'hat is claimed is:

1. An internal combustion engine comprising, in combination, a cylinder, :1 piston operated therein, a crank, a connecting rod from the piston to the crank, a crank case,

an air inlet pipe in the forward end of the crank case, an air outlet pipe on the opposite side of the crank case from the inlet,

.and a cowl swivelly connected to the exhaust end of the outlet pipe, said cowl being adapted to swing in the direction of theflow of the external air in passing over the englue.

2. An internal combustion engine as claimed in claim 1, in which anarrow passage is provided between the cowl and the exhaust end of the outlet pipe whereby external air may flow throughsaid passage.

In testimony whereof I have signed my name to this specification.

JOHN R. MILLER. 

